The calculated distance (air line) between Zürich (Kreis 4) / Aussersihl and La Chaux-de-Fonds is approximately 82 miles respectively 132 kilometers.
By car or train, the actual journey to La Chaux-de-Fonds is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 4) / Aussersihl and La Chaux-de-Fonds has been calculated here.
Air line (approximately)
132 kilometers
71 nautical miles